Oerlikon RUVAC WA, Инструкция по установке и эксплуатации

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ATEX
13 GA03107_002_A4 - 09/2015 - © Oerlikon Leybold Vacuum
Ignition Protection Type and Marking of the Electrical Compo-
nents of the RUVAC WA/WAU ATEX Kat. 3 (i) and 3 (i) / 3 (o)
a) Motor:
Ex e IIC T3 (200 °C) bzw. Ex de IIC T4 (135 °C)
b) Temperature sensor (only permissible for T3 operation)
In order to ensure that in any operating mode and in case the forevacuum
pump is affected by malfunctions, so that the machine does not exceed tem-
perature class T3, the use of a temperature sensor is required (not included
in the delivery). This temperature sensor measures the gas temperature at the
discharge flange of the RUVAC.
Ignition protection type, for example 1/2 G Ex ib IIC T6.
Determining the Operating Range
for TX in ATEX Zone 2 (i) and (o) X (Category 3 (i) and (o))
The possible operating range for temperature classification TX is based on
the effective pumping speed of the backing pump which is used (ScrewLine,
for example) and connected to the discharge port of the RUVAC and the
effective pumping speed of the RUVAC.
From this effective pumping speed there results the effective compression
ratio K
eff
. This is limited by the envelope K
0
as maximum compression, and at
high pressures by the maximum permissible pressure difference.
Effective pumping speed RUVAC
Effective pumping speed of the backing pump at the discharge port RUVAC
k
eff
=
p
v
= (compression pressure = pressure at the discharge side RUVAC)
p
a
= Operating pressure RUVAC (intake side)
k
eff
=
k
eff
= Effective compression ratio